The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 250.5 and a standard deviation of 67.2. (All units are 1000 cells/L.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 1 standard deviation of the mean, or between 183.3 and 317.7? b. What is the approximate percentage of women with platelet counts between 48.9 and 452.1? a. Approximately % of women in this group have platelet counts within 1 standard deviation of the mean, or between 183.3 and 317.7. (Type an integer or a decimal. Do not round.)